3 years ago

PLEASE HELP (ᗒᗣᗕ)՞

Mathematics

1 answer:

erastova [34]3 years ago

5 0

I am pretty sure that it is c.(-1,0)

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mario62 [17]

Answer:

$f(6) = \frac{6 {}^{2} - 2.6 - 8}{6 {}^{2} - 14.6 + 45} = \frac{16}{ - 3} = \frac{ - 16}{3}$

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3 years ago

Gribbles are small, pale white, marine worms that bore through wood. While sometimes considered a pest since they can wreck wood

Stells [14]

<u>Answer with explanation:</u>

As per given , we have

A sample of 50 gribbles finds an average length of 3.1 mm with a standard deviation of 0.72.

i.e. n= 50

Degree of freedom = n-1=49

$\overline{x}=3.1\ mm$

$s=0.72\ mm$

The point estimate of the population mean is equals to the sample mean.

i.e. The best estimate for the length of gribbles= 3.1 mm

Also, population standard deviation is unknown , then the confidence interval would be :

$E=t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

For df= 49 and significance level of 0.05 , the t- value (using t-distribution table) would be :

$t_{0.05/2, 49}=t_{0.025, 49}= 2.010$

Now, Margin of error : $E=(2.010)\dfrac{0.72}{\sqrt{50}}$

$=0.204664986747\approx0.20$

95% confidence interval : $(\overline{x}-E,\ \overline{x}+E)$

$i.e.\ (3.1-0.20, 3.1+0.20)=(2.90,\ 3.30)$

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4 years ago

Please help me solve this problem

Dominik [7]

5/8÷8=5/8×1/8
5/64 is the answer

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3 years ago

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On a typical day flights at a local airport arrive at a rate 10 every 15 minutes at this rate how many would you expect to arriv

harina [27]

How many times do 15 minutes fit into one hour? 4 times: 4*15=60 mins.

So that means that 4 times per hour 10 flights appear, and in total 4*10=40 planes arrive over one hour!

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3 years ago

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Travka [436]

I think it is $40 I’m not sure

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3 years ago

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PLEASE HELP (ᗒᗣᗕ)՞